Other questions in this quiz

2. Why is it better?

  • The signal is less likely to be lost or inturrupted
  • it travels faster

3. What are lasers used for?

  • Carrying data through optic fibres
  • remote contols

4. If i spend £400 on a solar panel and the panel saves me £20 a year what is the payback time??

  • 20 years
  • 40 years
  • 10 years

5. What is the trough on a wave?

  • the lowest point on a wave
  • the highest point on a wave

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